706 lines
14 KiB
C++
706 lines
14 KiB
C++
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/*++
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Copyright (c) 1994-1999 Microsoft Corporation
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All rights reserved.
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Module Name:
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common.cxx
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Abstract:
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common functions across all spooler components
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Author:
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Steve Kiraly (SteveKi)
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Revision History:
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Felix Maxa (AMaxa) 19 Apr 2001
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Added StrCatSystemPath
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--*/
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#include "spllibp.hxx"
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#pragma hdrstop
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#include "splcom.h"
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extern "C"
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DWORD
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WINAPIV
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StrCatAlloc(
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IN OUT LPCTSTR *ppszString,
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...
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)
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/*++
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Description:
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This routine concatenates a set of null terminated strings
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and returns a pointer to the new string. It's the callers
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responsibility to release the returned string with a call
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to FreeSplMem(); The last argument must be a NULL
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to signify the end of the argument list.
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Arguments:
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ppszString - pointer where to return pointer to newly created
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string which is the concatenation of the passed
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in strings.
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... - variable number of string to concatenate.
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Returns:
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ERROR_SUCCESS if new concatenated string is returned,
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or ERROR_XXX if an error occurred.
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Notes:
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The caller must pass valid strings as arguments to this routine,
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if an integer or other parameter is passed the routine will either
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crash or fail abnormally. Since this is an internal routine
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we are not in try except block for performance reasons.
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Usage
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--*/
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{
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UINT uTotalLen = 0;
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DWORD dwRetval = ERROR_INVALID_PARAMETER;
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LPTSTR pszString = NULL;
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LPCTSTR pszTemp = NULL;
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va_list pArgs;
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//
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// Validate the pointer where to return the buffer.
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//
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if (ppszString)
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{
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dwRetval = ERROR_SUCCESS;
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//
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// Keep the callers from getting random value on failure.
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//
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*ppszString = NULL;
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//
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// Get pointer to argument frame.
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//
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va_start(pArgs, ppszString);
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//
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// Tally up all the strings.
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//
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for ( ; ; )
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{
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//
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// Get pointer to the next argument.
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//
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pszTemp = va_arg(pArgs, LPCTSTR);
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if (!pszTemp)
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{
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break;
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}
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//
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// Sum all the string lengths.
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//
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uTotalLen = uTotalLen + _tcslen(pszTemp);
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}
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//
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// Need space for the null terminator.
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//
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uTotalLen = uTotalLen + 1;
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//
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// Allocate the space for the sum of all the strings.
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//
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pszString = (LPTSTR)AllocSplMem(uTotalLen * sizeof(TCHAR));
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if (pszString)
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{
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*pszString = L'\0';
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//
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// Reset the pointer to the argument frame.
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//
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va_start(pArgs, ppszString);
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//
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// Concatenate all the strings.
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//
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for ( ; ; )
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{
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pszTemp = va_arg(pArgs, LPCTSTR);
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if (!pszTemp)
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{
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break;
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}
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_tcscat(pszString, pszTemp);
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}
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//
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// Copy back the string pointer to the caller.
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//
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*ppszString = pszString;
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}
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else
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{
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dwRetval = ERROR_NOT_ENOUGH_MEMORY;
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}
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va_end(pArgs);
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}
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//
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// Set the last error in case the caller forgets to.
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//
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if (dwRetval != ERROR_SUCCESS)
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{
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SetLastError(dwRetval);
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}
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return dwRetval;
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}
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extern "C"
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DWORD
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WINAPIV
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StrNCatBuff(
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IN LPTSTR pszBuffer,
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IN UINT cchBuffer,
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...
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)
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/*++
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Description:
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This routine concatenates a set of null terminated strings
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into the provided buffer. The last argument must be a NULL
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to signify the end of the argument list.
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Arguments:
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pszBuffer - pointer buffer where to place the concatenated
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string.
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cchBuffer - character count of the provided buffer including
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the null terminator.
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... - variable number of string to concatenate.
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Returns:
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ERROR_SUCCESS if new concatenated string is returned,
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or ERROR_XXX if an error occurred.
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Notes:
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The caller must pass valid strings as arguments to this routine,
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if an integer or other parameter is passed the routine will either
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crash or fail abnormally. Since this is an internal routine
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we are not in try except block for performance reasons.
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--*/
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{
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DWORD dwRetval = ERROR_INVALID_PARAMETER;
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LPCTSTR pszTemp = NULL;
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LPTSTR pszDest = NULL;
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va_list pArgs;
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//
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// Validate the pointer where to return the buffer.
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//
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if (pszBuffer && cchBuffer)
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{
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//
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// Assume success.
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//
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dwRetval = ERROR_SUCCESS;
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//
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// Get pointer to argument frame.
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//
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va_start(pArgs, cchBuffer);
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//
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// Get temp destination pointer.
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//
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pszDest = pszBuffer;
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//
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// Insure we have space for the null terminator.
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//
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cchBuffer--;
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//
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// Collect all the arguments.
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//
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for ( ; ; )
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{
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//
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// Get pointer to the next argument.
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//
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pszTemp = va_arg(pArgs, LPCTSTR);
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if (!pszTemp)
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{
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break;
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}
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//
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// Copy the data into the destination buffer.
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//
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for ( ; cchBuffer; cchBuffer-- )
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{
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if (!(*pszDest = *pszTemp))
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{
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break;
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}
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pszDest++, pszTemp++;
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}
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//
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// If were unable to write all the strings to the buffer,
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// set the error code and nuke the incomplete copied strings.
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//
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if (!cchBuffer && pszTemp && *pszTemp)
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{
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dwRetval = ERROR_INVALID_PARAMETER;
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*pszBuffer = _T('\0');
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break;
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}
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}
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//
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// Terminate the buffer always.
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//
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*pszDest = _T('\0');
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va_end(pArgs);
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}
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//
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// Set the last error in case the caller forgets to.
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//
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if (dwRetval != ERROR_SUCCESS)
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{
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SetLastError(dwRetval);
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}
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return dwRetval;
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}
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extern "C"
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LPTSTR
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WINAPI
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SubChar(
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IN LPCTSTR pszIn,
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IN TCHAR cIn,
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IN TCHAR cOut
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)
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/*++
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Routine Description:
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Replaces all instances of cIn in pszIn with cOut.
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Arguments:
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pszIn - input string
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cIn - character to replace with cOut
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cOut - character that replaces cIn
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Return Value:
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If successful, returns a pointer to an allocated buffer containing the
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output string. If the return value is NULL, SubChar has fails and
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GetLastError() will return the error.
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Notes:
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An output buffer is allocated (and contains NULL) even if pszOut is NULL.
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--*/
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{
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LPTSTR pszReturn = NULL;
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LPTSTR pszOut = NULL;
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if (cIn && pszIn)
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{
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if ((pszOut = pszReturn = (LPTSTR) AllocSplMem((_tcslen(pszIn) + 1)*sizeof(TCHAR))))
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{
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for (; *pszIn ; ++pszIn, ++pszOut)
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{
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*pszOut = (*pszIn == cIn) ? cOut : *pszIn;
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}
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*pszOut = *pszIn;
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}
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}
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else
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{
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SetLastError(ERROR_INVALID_PARAMETER);
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}
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return pszReturn;
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}
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/*++
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Routine Name:
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GetLastErrorAsHResult
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Routine Description:
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Returns the last error as an HRESULT assuming a failure.
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Arguments:
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None
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Return Value:
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An HRESULT.
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--*/
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EXTERN_C
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HRESULT
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GetLastErrorAsHResult(
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VOID
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)
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{
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return HResultFromWin32(GetLastError());
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}
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/*++
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Routine Name:
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GetFileNamePart
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Routine Description:
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Get the file name portion of a path.
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Arguments:
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pszFullPath - Full path to a file
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ppszFileName - File name
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Return Value:
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An HRESULT
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--*/
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EXTERN_C
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HRESULT
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GetFileNamePart(
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IN PCWSTR pszFullPath,
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OUT PCWSTR *ppszFileName
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)
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{
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HRESULT hRetval = E_FAIL;
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WCHAR szfname[_MAX_FNAME] = {0};
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hRetval = pszFullPath && ppszFileName ? S_OK : E_INVALIDARG;
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if (SUCCEEDED(hRetval))
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{
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_wsplitpath(pszFullPath, NULL, NULL, szfname, NULL);
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*ppszFileName = wcsstr(pszFullPath, szfname);
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}
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return hRetval;
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}
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/*++
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Routine Name:
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GetLastErrorAsHResultAndFail
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Routine Description:
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This routine gets the last error as HRESULT, and if there was no last error,
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returns E_UNEXPECTED.
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Arguments:
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None
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Return Value:
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An HRESULT
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--*/
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EXTERN_C
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HRESULT
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GetLastErrorAsHResultAndFail(
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void
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)
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{
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HRESULT hRetval = E_FAIL;
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hRetval = GetLastErrorAsHResult();
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if (S_OK == hRetval)
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{
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hRetval = E_UNEXPECTED;
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}
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return hRetval;
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}
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/*++
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|
Routine Name:
|
||
|
|
|
||
|
|
HResultFromWin32
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
Returns the last error as an HRESULT assuming a failure.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
dwError - Win32 error code
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
An HRESULT
|
||
|
|
|
||
|
|
--*/
|
||
|
|
EXTERN_C
|
||
|
|
HRESULT
|
||
|
|
HResultFromWin32(
|
||
|
|
IN DWORD dwError
|
||
|
|
)
|
||
|
|
{
|
||
|
|
return HRESULT_FROM_WIN32(dwError);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Description:
|
||
|
|
|
||
|
|
This routine allocates a string which is the concatenation:
|
||
|
|
Directory\pszFile. Directory is Windir, SystemRoot, CurrentDir,
|
||
|
|
SystemWindowsDir, depending on the edir input argument.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
pszFile - file name
|
||
|
|
eDir - enumeration, tells the function what directory to concatenate
|
||
|
|
ppszFullPath - pointer where to return pointer to newly created string
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
|
||
|
|
ERROR_SUCCESS if new concatenated string is returned,
|
||
|
|
or ERROR_XXX if an error occurred.
|
||
|
|
|
||
|
|
Notes:
|
||
|
|
|
||
|
|
The caller must use FreeSplMem to free the string returned by this function
|
||
|
|
|
||
|
|
--*/
|
||
|
|
EXTERN_C
|
||
|
|
DWORD
|
||
|
|
WINAPI
|
||
|
|
StrCatSystemPath(
|
||
|
|
IN LPCTSTR pszFile,
|
||
|
|
IN EStrCatDir eDir,
|
||
|
|
OUT LPTSTR *ppszFullPath
|
||
|
|
)
|
||
|
|
{
|
||
|
|
DWORD Error = ERROR_INVALID_PARAMETER;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Validate arguments
|
||
|
|
//
|
||
|
|
if (pszFile && ppszFullPath)
|
||
|
|
{
|
||
|
|
DWORD cchNeeded;
|
||
|
|
|
||
|
|
*ppszFullPath = NULL;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get the number of chars needed to hold the system directory. The returned
|
||
|
|
// number accounts for the NULL terminator. GetCurrentDirectory is different than
|
||
|
|
// the other function, because if takes the size of the buffer as the first
|
||
|
|
// argument.
|
||
|
|
//
|
||
|
|
cchNeeded = eDir == kWindowsDir ? GetWindowsDirectory(NULL, 0) :
|
||
|
|
eDir == kSystemWindowsDir ? GetSystemWindowsDirectory(NULL, 0) :
|
||
|
|
eDir == kSystemDir ? GetSystemDirectory(NULL, 0) :
|
||
|
|
GetCurrentDirectory(0, NULL);
|
||
|
|
|
||
|
|
Error = cchNeeded ? ERROR_SUCCESS : GetLastError();
|
||
|
|
|
||
|
|
if (Error == ERROR_SUCCESS)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Calculate the size of the buffer needed. Note that cchNeeded already
|
||
|
|
// includes the NULL terminator.
|
||
|
|
// length(directory) + whack + length(pszFile)
|
||
|
|
//
|
||
|
|
cchNeeded = cchNeeded + 1 + _tcslen(pszFile);
|
||
|
|
|
||
|
|
*ppszFullPath = static_cast<LPTSTR>(AllocSplMem(cchNeeded * sizeof(TCHAR)));
|
||
|
|
|
||
|
|
Error = *ppszFullPath ? ERROR_SUCCESS : GetLastError();
|
||
|
|
|
||
|
|
if (Error == ERROR_SUCCESS)
|
||
|
|
{
|
||
|
|
DWORD cchTemp;
|
||
|
|
|
||
|
|
cchTemp = eDir == kWindowsDir ? GetWindowsDirectory(*ppszFullPath, cchNeeded) :
|
||
|
|
eDir == kSystemWindowsDir ? GetSystemWindowsDirectory(*ppszFullPath, cchNeeded) :
|
||
|
|
eDir == kSystemDir ? GetSystemDirectory(*ppszFullPath, cchNeeded) :
|
||
|
|
GetCurrentDirectory(cchNeeded, *ppszFullPath);
|
||
|
|
if (cchTemp)
|
||
|
|
{
|
||
|
|
_tcscat(*ppszFullPath, _T("\\"));
|
||
|
|
_tcscat(*ppszFullPath, pszFile);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
Error = GetLastError();
|
||
|
|
|
||
|
|
FreeSplMem(*ppszFullPath);
|
||
|
|
|
||
|
|
*ppszFullPath = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return Error;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Name:
|
||
|
|
|
||
|
|
StatusFromHResult
|
||
|
|
|
||
|
|
Description:
|
||
|
|
|
||
|
|
This function returns a win32 error code from an HRESULT if possible and
|
||
|
|
it failed, if it is not a win32 error code, it just returns the error code,
|
||
|
|
otherwise it returns ERROR_SUCCESS.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
hr - The HRESULT.
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
|
||
|
|
The status equivalent of the hresult.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
EXTERN_C
|
||
|
|
DWORD
|
||
|
|
StatusFromHResult(
|
||
|
|
IN HRESULT hr
|
||
|
|
)
|
||
|
|
{
|
||
|
|
DWORD Status = ERROR_SUCCESS;
|
||
|
|
|
||
|
|
if (FAILED(hr))
|
||
|
|
{
|
||
|
|
if (HRESULT_FACILITY(hr) == FACILITY_WIN32)
|
||
|
|
{
|
||
|
|
Status = HRESULT_CODE(hr);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Kind of wacky, should we have a table here for reasonably translatable HResults?
|
||
|
|
//
|
||
|
|
Status = hr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Name:
|
||
|
|
|
||
|
|
BoolFromHResult
|
||
|
|
|
||
|
|
Description:
|
||
|
|
|
||
|
|
This function take an HRESULT input, if the HRESULT is a failure, it sets
|
||
|
|
the last error and returns false, otherwise it returns TRUE.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
hr - The HRESULT.
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
|
||
|
|
A BOOLEAN, Sets the last error
|
||
|
|
|
||
|
|
--*/
|
||
|
|
EXTERN_C
|
||
|
|
BOOL
|
||
|
|
BoolFromHResult(
|
||
|
|
IN HRESULT hr
|
||
|
|
)
|
||
|
|
{
|
||
|
|
DWORD Status = StatusFromHResult(hr);
|
||
|
|
|
||
|
|
if (Status != ERROR_SUCCESS)
|
||
|
|
{
|
||
|
|
SetLastError(Status);
|
||
|
|
}
|
||
|
|
|
||
|
|
return Status == ERROR_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Name:
|
||
|
|
|
||
|
|
BoolFromStatus
|
||
|
|
|
||
|
|
Description:
|
||
|
|
|
||
|
|
This function sets the last error to the given win32 error code if it is not
|
||
|
|
error success. It returns the corresponding error result.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
Status - The Win32 error code.
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
|
||
|
|
A BOOLEAN, Sets the last error
|
||
|
|
|
||
|
|
--*/
|
||
|
|
EXTERN_C
|
||
|
|
BOOL
|
||
|
|
BoolFromStatus(
|
||
|
|
IN DWORD Status
|
||
|
|
)
|
||
|
|
{
|
||
|
|
BOOL bRet = TRUE;
|
||
|
|
|
||
|
|
if (ERROR_SUCCESS != Status)
|
||
|
|
{
|
||
|
|
SetLastError(Status);
|
||
|
|
|
||
|
|
bRet = FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return bRet;
|
||
|
|
}
|